Assertion :The earliest fossil form in the phylogeny of horse is Eohippus. Reason: Eohippus lived during the early Pliocene epoch.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is C Assertion is correct but Reason is incorrect.
Assertion is correct as Eohippus is the earliest fossil form in the phylogeny of horse. Reason is incorrect as Eohippus lived during the early Eocene Epoch, about 50 million years ago. It lived in the Northern hemisphere (in Asia, Europe, and North America). The first fossils of this tiny horse were found in England by the famous paleontologist Richard Owen in 1841 and named Hyracotherium.
Therefore, the correct answer is option C.

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